<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>404 Not Found</title>
  <style>
    body {
      text-align: center;
      background-color: #f1f1f1;
      font-family: Arial, sans-serif;
    }
    h1 {
      margin-top: 200px;
      font-size: 36px;
    }
    hr {
      margin-top: 20px;
      border: none;
      border-top: 1px solid #ccc;
    }
    p {
      margin-top: 20px;
      font-size: 18px;
    }
  </style>
</head>
<body>
  <h1>404 Not Found</h1>
  <hr>
  <p>Sorry, the page you requested could not be found.</p>
</body>
</html>